Justseeker on Family Tree Circles

I am looking for info on Helena Forrester Johnston (nee Just) married in 1921 to Stanley George Johnson who ran a Billiard Room in Warkworth.Then worked for his father in the family Bakery in Papatoetoe
Stan died in 1928 of cancer aged 38
Helena then seemed to disappear,unable to be found even on her fathers death,
I have since found her in Sydney from 1933 to 1937, she then disappears again.
It is said the Johnson family blamed Helena for Stans death,again it is said that Stan had a large mole on his back, which was probably a Melanoma.
Helena removed the mole with a razor blade and soon after Stan died, consequently she fled to Australia.
Can anyone add to this, maybe from the Johnson side